The short-Stay visa is a Schengen visa. It allows you to stay in the Schengen area for a maximum of 90 days within a 180-day period. Your visa will be valid for a specific period. This period may be shorter than 90 days. You can travel freely between the 26 Schengen countries while your visa is valid.
If you want to leave and re-enter the Schengen area within the 180-day period, choose the multiple-entry option when making your application.